Kooperativer Bibliotheksverbund

Berlin Brandenburg

and
and

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
Type of Medium
Language
Year
  • 1
    Language: English
    In: Water Research, 2011, Vol.45(13), pp.3999-4007
    Description: Ozone application is an effective tool to reduce loads of (micro)pollutants in wastewater, however, its ecotoxicological implications are largely unknown. Therefore, the feeding rates of a leaf-shredding invertebrate ( ) exposed to secondary (=non-ozone) or ozone treated wastewater were investigated to assess potential ecotoxicological effects. Two repetitive experiments resulted in significantly higher feeding rates for gammarids exposed to ozone compared to non-ozone treated wastewater sampled from a treatment plant equipped with a full-scale ozonation. A further experiment confirmed these results also for wastewater from the same treatment plant, when ozonation was conducted at the lab-scale. However, the deviations in dissolved organic carbon profiles of ozone and non-ozone wastewater did not seem to be the driving factor for the effects observed. Two additional experiments displayed on the one hand a higher feeding rate of if exposed to ten-fold enriched eluates from solid phase extraction cartridges loaded with ozone compared to non-ozone treated wastewater. On the other hand, the mean feeding rate of gammarids exposed to non-ozone treated wastewater, which contained hardly any (micro)pollutants (i.e. pharmaceuticals), was at the same level as wastewater from the same source additionally treated with ozone. These results suggest that not an alteration in the organic matrix but a reduction in the load of micropollutants most likely triggered the effects in the bioassay applied. Hence, the feeding rate of appears to be a well-suited bioassay to indicate alterations in ecotoxicological properties of wastewater due to the application of advanced oxidation processes like ozonation. ► Ozonation of municipal wastewater reduces ecotoxicity for gammarids. ► Alteration in organic matrix caused by ozonation did not affect gammarids. ► Loads of micropollutants seem to trigger the effects in the feeding assay. ► Feeding assays suggest to be suitable to evaluate advance oxidation techniques.
    Keywords: Pharmaceuticals ; Ozone ; By-Products ; Solid Phase Extraction ; Gammarus ; Feeding Assay ; Engineering
    ISSN: 0043-1354
    E-ISSN: 1879-2448
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Language: English
    In: Chemosphere, July 2013, Vol.92(5), pp.483-489
    Description: ► The invasive aquatic amphipod is more tolerant to lambda-cyhalothrin than the native one. ► Predation success on Baetis nymphs is substantially higher for than ► may contribute substantially to leaf litter decomposition. Invasive species are considered as one of the major threats for biodiversity worldwide. The Ponto-Caspian species , for instance, spread throughout continental Europe and was recorded for the first time also within Lake Constance in 2003. Although is a highly competitive species it was not capable of replacing the native completely in this ecosystem, especially in the riparian zones of the highly agriculturally used island “Reichenau”. As differences in pesticide sensitivity between both amphipod species may explain their distribution, the present study assessed the implication of the highly toxic pyrethroid lambda-cyhalothrin, which is authorized for application in the Lake Constance region, assuming the invasive species being more sensitive than the native one. However, both the feeding activity bioassays, which measured the leaf consumption over 7 d ( = 20), as well as the predation bioassay, which measured the predation rate upon nymphs in concert with the feeding activity on leaf material over 96 h ( = 13), revealed an up to 5-fold higher tolerance of towards lambda-cyhalothrin. These results suggest the investigated insecticide not being the trigger for the observed distribution pattern of both amphipod species. Hence, other factors like the diversity of habitat structures or the levels of ammonia may have facilitated the coexistence. Nevertheless, the present study uncovered a high leaf-shredding efficacy of the invasive species suggesting that its role in the leaf decomposition process may have been underestimated in the past.
    Keywords: Functional Feeding Group ; Insecticide ; Leaf Litter Decomposition ; Ecosystem Function ; Predator–Prey Interaction ; Freshwater Biodiversity ; Chemistry ; Ecology
    ISSN: 0045-6535
    E-ISSN: 1879-1298
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Language: English
    In: The Science of the Total Environment, June 15, 2014, Vol.484, p.84(8)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.scitotenv.2014.03.015 Byline: Mirco Bundschuh, Willem Goedkoop, Jenny Kreuger Abstract: The European Water Framework Directive requires surface water bodies to have a good chemical and ecological status. Although relatively few pesticides are included in the list of priority pollutants, they pose, due to their intrinsic biological activity, a significant risk for the integrity of aquatic ecosystems. In this context, the pesticide (up to 128 pesticides including some transformation products) exposure pattern in four agricultural streams and two rivers was determined from 2002 to 2011 under the umbrella of the Swedish national monitoring program employing time-proportional and grab sampling strategies, respectively. After transforming the measured pesticide concentrations into toxic units, the European Uniform Principles for algae (chronic), invertebrates and fish (both acute), which are partly employed as benchmark for pesticide regulation, were only occasionally (〈2%) exceeded. Moreover, this evaluation showed no long-term trends over the years. However, recent publications suggested that those thresholds are not protective for ecosystem structure and function, indicating a risk of up to 20% and 35% of the samples from the agricultural streams and the rivers, respectively. Moreover, the monitoring data show a continuous but rather low toxic potential of pesticides for all three trophic levels throughout the year, which suggests pesticides as an evolutionary force in agriculturally impacted aquatic ecosystems. However, the flow-triggered sampling, which was implemented as an additional sampling strategy in one of the agricultural streams starting in 2006, displayed an up to 7-fold underestimation of the maximum concentration in terms of toxic units for daphnids and fish during run-off events. The present study thus underpins that the optimal sampling design for pesticide monitoring strongly depends on its overall purpose. If the long-term exposure pattern is of concern a time-proportional composite sampling strategy is recommended, while for an assessment of peak exposures a flow-event-triggered high-resolution sampling strategy is superior. Article History: Received 9 January 2014; Revised 5 March 2014; Accepted 5 March 2014 Article Note: (miscellaneous) Editor: D. Barcelo
    Keywords: Ecosystem Components -- Analysis ; Water Resources -- Analysis ; Pesticides -- Analysis ; Aquatic Ecosystems -- Analysis
    ISSN: 0048-9697
    Source: Cengage Learning, Inc.
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Language: English
    In: Chemosphere, Nov, 2011, Vol.85(10), p.1563(5)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.chemosphere.2011.07.060 Byline: Mirco Bundschuh, Jochen P. Zubrod, Dominic Englert, Frank Seitz, Ricki R. Rosenfeldt, Ralf Schulz Keywords: Nanoparticle; Titanium dioxide; Ultraviolet irradiation; Gammarus fossarum; Accumulation; Reactive oxygen species Abbreviations: nTiO.sub.2, titanium dioxide nanoparticles; ROS, reactive oxygen species; UV, ultraviolet; ANOVA, analysis of variance; PNEC, predicted no effect concentration Abstract: Display Omitted Author Affiliation: Institute for Environmental Sciences, University of Koblenz-Landau, Fortstrasse 7, D-76829 Landau/Palatinate, Germany Article History: Received 17 April 2011; Revised 20 July 2011; Accepted 27 July 2011
    Keywords: Titanium Dioxide -- Analysis
    ISSN: 0045-6535
    Source: Cengage Learning, Inc.
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Language: English
    In: Chemosphere, 2011, Vol.82(3), pp.355-361
    Description: Advanced oxidation technologies such as ozonation have been proposed to improve removal efficiency of micropollutants during wastewater treatment. In a meta-analysis of peer-reviewed literature, we found no ecotoxicological effects of wastewater ozonation on invertebrates ( = 82), but significant adverse effects on bacteria ( = 24) and fish ( = 5). As information on functional endpoints or trophic interactions is lacking, we applied a bioassay relating to leaf litter decomposition to fill this gap. Leaf discs exposed to ozone-treated wastewater with a high (1.04 mg O (mg DOC) , = 49) ozone concentration were significantly preferred by an aquatic detritivore, , over discs conditioned in wastewater not treated with ozone. This effect might have been mediated by reduced bacterial and elevated fungal biomass, and appears to be the first demonstration of wastewater ozonation impacts on invertebrates and an associated ecosystem process. In accordance with the food-choice trials, chemical analyses revealed significantly decreased concentrations of organic micropollutants in wastewater treated with ozone at high concentrations. Thus, food-choice trials as applied here hold promise to assess environmental effects of advanced oxidation technologies in wastewater treatment and appear to be a valuable complement to the ecotoxicological toolbox in general.
    Keywords: Food Choice ; Indirect Effects ; Gammaridae ; Litter Decomposition ; Biocides ; Psychoactive Drugs ; Chemistry ; Ecology
    ISSN: 0045-6535
    E-ISSN: 1879-1298
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Language: English
    In: Journal of Hazardous Materials, 2011, Vol.192(2), pp.772-778
    Description: ► Meta-analysis displays reduced toxicity of wastewater due to activated carbon or ozone. ► Groups of species (invertebrates) react different than others (e.g. bacteria). ► Purification via SPE may overestimate the detoxification potential. ► bioassays showed reduced ecotoxicity due to activated carbon, ozone and TiO and UV. ► Activated carbon adsorbs nutrients, which may jeopardize any positive effect of this technique. Advanced treatment techniques, like ozone, activated carbon and TiO in combination with UV, are proposed to improve removal efficiency of micropollutants during wastewater treatment. In a meta-analysis of peer-reviewed literature, we found significantly reduced overall ecotoxicity of municipal wastewaters treated with either ozone ( = 667) or activated carbon (=113), while TiO and UV was not yet assessed. As comparative investigations regarding the detoxification potential of these advanced treatment techniques in municipal wastewater are scarce, we assessed them in four separate -feeding trials with 20 replicates per treatment. These bioassays indicate that ozone concentrations of approximately 0.8 mg ozone/mg DOC may produce toxic transformation products. However, referred effects are removed if higher ozone concentrations are used (1.3 mg ozone/mg DOC). Moreover, the application of 1 g TiO /l and ambient UV consistently reduced ecotoxicity. Although activated carbon may remove besides micropollutants also nutrients, which seemed to mask its detoxification potential, this treatment technique reduced the ecotoxicity of the wastewater following its amendment with nutrients. Hence, all three advanced treatment techniques are suitable to reduce the ecotoxicity of municipal wastewater mediated by micropollutants and may hence help to meet the requirements of the European Water Framework Directive.
    Keywords: Meta-Analysis ; Feeding Rate ; Wastewater ; Advanced Oxidation ; Activated Carbon ; Engineering ; Law
    ISSN: 0304-3894
    E-ISSN: 1873-3336
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Language: English
    In: PLoS ONE, May 1, 2015, Vol.10(5)
    Description: During their aquatic life cycle, nanoparticles are subject to environmentally driven surface modifications (e.g. agglomeration or coating) associated with aging. Although the ecotoxicological potential of nanoparticles might be affected by these processes, only limited information about the potential impact of aging is available. In this context, the present study investigated acute (96 h) and chronic (21 d) implications of systematically aged titanium dioxide nanoparticles (nTiO.sub.2 ; ~90 nm) on the standard test species Daphnia magna by following the respective test guidelines. The nTiO.sub.2 were aged for 0, 1, 3 and 6 d in media with varying ionic strengths (Milli-Q water: approx. 0.00 mmol/L and ASTM: 9.25 mmol/L) in the presence or absence of natural organic matter (NOM). Irrespective of the other parameters, aging in Milli-Q did not change the acute toxicity relative to an unaged control. In contrast, 6 d aged nTiO.sub.2 in ASTM without NOM caused a fourfold decreased acute toxicity. Relative to the 0 d aged particles, nTiO.sub.2 aged for 1 and 3 d in ASTM with NOM, which is the most environmentally-relevant setup used here, significantly increased acute toxicity (by approximately 30%), while a toxicity reduction (60%) was observed for 6 d aged nTiO.sub.2 . Comparable patterns were observed during the chronic experiments. A likely explanation for this phenomenon is that the aging of nTiO.sub.2 increases the particle size at the start of the experiment or the time of the water exchange from 100 nm to approximately 500 nm, which is the optimal size range to be taken up by filter feeding D. magna. If subjected to further agglomeration, larger nTiO.sub.2 particles, however, cannot be retained by the daphnids filter apparatus ultimately reducing their ecotoxicological potential. This non-linear pattern of increasing and decreasing nTiO.sub.2 related toxicity over the aging duration, highlights the knowledge gap regarding the underlying mechanisms and processes. This understanding seems, however, fundamental to predict the risks of nanoparticles in the field.
    Keywords: Nanoparticles ; Toxicity ; Humic Acids ; Titanium Dioxide
    ISSN: 1932-6203
    Source: Cengage Learning, Inc.
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    In: Freshwater Biology, December 2016, Vol.61(12), pp.2063-2074
    Description: Fine particulate organic matter (FPOM) provides a key longitudinal link within stream networks, and is the predominant food source for filter‐ and deposit‐feeding invertebrates, collectively classified as ‘collectors’. Organisms involved in producing and using FPOM are sensitive to chemical and other anthropogenic stressors, but information on such impacts, and on FPOM dynamics in general, is limited. Here, we review information on the ecological role of FPOM in streams, and discuss potential impacts on FPOM dynamics of organic and inorganic chemical stressors, including metals and pesticides. Emphasis is placed on faecal particles produced within the leaf‐litter processing chain. Key biological factors controlling the resource quality of FPOM for collectors include the identity of the invertebrates producing FPOM, and the nutritional quality of their food resources. FPOM nutrient content is also strongly influenced by microbial colonisation and activity, and FPOM processing rates are thus likely to be sensitive to the impacts of stressors affecting microbes, including nutrients and antimicrobial chemicals. The potential for FPOM to bind and subsequently transport chemical stressors is high, particularly for hydrophobic compounds, but the extent of such effects and impacts on collectors consuming contaminated particles has attracted only limited attention. Combining concepts and research approaches from ecotoxicology and basic stream ecology would facilitate development of a common integrated framework for understanding the role of FPOM, and assessing anthropogenic impacts on FPOM dynamics in stream networks.
    Keywords: Chemical Stressors ; Food Quality ; Collector‐Shredder Interaction ; Processing Chain ; Fine Particulate Organic Matter
    ISSN: 0046-5070
    E-ISSN: 1365-2427
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    Language: English
    In: The Science of the Total Environment, Nov 15, 2015, Vol.533, p.40(9)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.scitotenv.2015.06.090 Byline: Diego Fernandez, Katharina Voss, Mirco Bundschuh, Jochen P. Zubrod, Ralf B. Schafer Abstract: Large amounts of fungicides are applied globally and partly enter freshwater ecosystems. A few laboratory studies examined their effects on decomposer communities and the ecosystem process of litter decomposition (LD), whereas the field situation remains largely unknown. We conducted a field study with 17 stream sites in a German vineyard area where fungicides represent the dominant pest control agent. Passive samplers were used to monitor 15 fungicides and 4 insecticides in streams and their toxicity was described using the toxic unit approach, whereas sediment samples were taken to characterise total copper concentrations. Microbial and leaf-shredding invertebrate community composition and related LD rates were assessed at each site. The structure of microbial and shredder communities as well as fungal biomass changed along the fungicide toxicity gradient. The changes in microbial endpoints were associated with a reduction of microbial LD rate of up to 40% in polluted streams. By contrast, neither the invertebrate LD rate nor in-situ measured gammarid feeding rates correlated with fungicide toxicity, but both were negatively associated with sediment copper concentrations. A subsequent laboratory experiment employing field fungicide concentrations suggested that the microbial community changes are causal. Overall, our results suggest that fungicides can affect LD under field conditions. Article History: Received 20 April 2015; Revised 22 June 2015; Accepted 22 June 2015 Article Note: (miscellaneous) Editor: D. Barcelo
    Keywords: Fungicides – Analysis ; Vineyards – Analysis ; Wineries – Analysis ; Freshwater Ecosystems – Analysis ; Sediments (Geology) – Analysis
    ISSN: 0048-9697
    Source: Cengage Learning, Inc.
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    Language: English
    In: The Science of the Total Environment, June 1, 2013, Vol.454-455, p.401(10)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.scitotenv.2013.03.025 Byline: Dominic Englert, Jochen P. Zubrod, Ralf Schulz, Mirco Bundschuh Abstract: During recent years, increasing incidences of summer droughts - likely driven by climate change - reduced the dilution potential of low-order streams for secondary treated wastewater also in temperate Europe. Despite the potential risks to ecosystem integrity, there is a paucity of knowledge regarding the effects of different wastewater dilution potentials on ecosystem functions. The present study investigated the implications of secondary treated wastewater released into a third-order stream (Queich, southwest Germany) during a season with low dilution potential (summer; ~90% wastewater) as compared to a season with high dilution potential (winter; ~35% wastewater) in terms of leaf litter decomposition and macroinvertebrate communities. Adverse effects in macroinvertebrate mediated leaf mass loss (~65%), gammarids' feeding rate (~80%), leaf associated fungal biomass (〉40%) and shifts in macroinvertebrate community structure were apparent up to 100 and 300m (partially 500m) downstream of the wastewater treatment plant effluent during winter and summer, respectively. In addition, a Gammarus fossarum laboratory feeding trial demonstrated the potential of powdered activated carbon to reduce the ecotoxicity of released wastewater. These results urge the development and evaluation of adequate management strategies, e.g. the application of advanced wastewater treatment technologies, to protect the integrity of freshwater ecosystems, which is required by the European Water Framework Directive -- also considering decreasing dilution potential of streams as projected by climate change scenarios. Article History: Received 13 January 2013; Revised 4 March 2013; Accepted 6 March 2013
    Keywords: Sewage Treatment -- Analysis ; Sewage Treatment -- Environmental Aspects ; Ecosystem Components -- Analysis ; Ecosystem Components -- Environmental Aspects ; Global Temperature Changes -- Analysis ; Global Temperature Changes -- Environmental Aspects ; Freshwater Ecosystems -- Analysis ; Freshwater Ecosystems -- Environmental Aspects ; Wastewater -- Analysis ; Wastewater -- Environmental Aspects
    ISSN: 0048-9697
    Source: Cengage Learning, Inc.
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. Further information can be found on the KOBV privacy pages